I read through their Files a while ago but it isn't something I'm prepared to undertake at any time in the near future. Too many question marks, not enough research, too much money. It fails all my tests at this point.

ME/CFS is a disease where the Th1 (antiviral) response is weak, but the Th2 response is ramped up. To treat ME/CFS, you really need to boost Th1, and reduce Th2.

However, helminth therapy does the opposite: reduces Th1, and boosts Th2. See here:

In the past, helminths were thought to simply suppress Th1 cells while inducing Th2 cells. Rook points out that this hypothesis would only explain the regulatory effects of parasitic worms on autoimmune diseases caused by Th1 cells. However, helminths also regulate Th2-caused diseases, such as allergy and asthma. Professor Rook postulates that different parasitic worms suppress different Th types, but always in favor of regulatory T (Treg) cells.